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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 634 · 40 questions
TalentJR

How it works (Double and halve): Find the number ending in 5 and the even number. Double the one ending in 5; halve the even one. Repeat while it helps (25 → 50 → 100), then multiply.

NameDateTime takenScore ___ / 40
  1. 1.35 × 12 =
  2. 2.45 × 28 =
  3. 3.45 × 6 =
  4. 4.10 × 55 =
  5. 5.25 × 6 =
  6. 6.14 × 125 =
  7. 7.6 × 75 =
  8. 8.36 × 45 =
  9. 9.55 × 16 =
  10. 10.125 × 36 =
  11. 11.15 × 30 =
  12. 12.6 × 65 =
  13. 13.24 × 125 =
  14. 14.25 × 22 =
  15. 15.16 × 35 =
  16. 16.28 × 25 =
  17. 17.55 × 12 =
  18. 18.75 × 18 =
  19. 19.40 × 15 =
  20. 20.45 × 14 =
  21. 21.12 × 35 =
  22. 22.20 × 55 =
  23. 23.75 × 34 =
  24. 24.125 × 8 =
  25. 25.15 × 8 =
  26. 26.65 × 28 =
  27. 27.32 × 75 =
  28. 28.15 × 34 =
  29. 29.6 × 55 =
  30. 30.125 × 18 =
  31. 31.18 × 45 =
  32. 32.16 × 55 =
  33. 33.40 × 125 =
  34. 34.65 × 24 =
  35. 35.20 × 125 =
  36. 36.55 × 38 =
  37. 37.15 × 16 =
  38. 38.12 × 25 =
  39. 39.26 × 35 =
  40. 40.75 × 22 =

Answer key

  1. 420
  2. 1260
  3. 270
  4. 550
  5. 150
  6. 1750
  7. 450
  8. 1620
  9. 880
  10. 4500
  11. 450
  12. 390
  13. 3000
  14. 550
  15. 560
  16. 700
  17. 660
  18. 1350
  19. 600
  20. 630
  21. 420
  22. 1100
  23. 2550
  24. 1000
  25. 120
  26. 1820
  27. 2400
  28. 510
  29. 330
  30. 2250
  31. 810
  32. 880
  33. 5000
  34. 1560
  35. 2500
  36. 2090
  37. 240
  38. 300
  39. 910
  40. 1650

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